I’ve been organizing my anime and manga collection on my sites.google profile. It’s where I list all the series I’ve completed, my current watches, and even my reviews of different arcs. I also track my favorite studios like MAPPA and Ufotable. It’s a simple site, but it helps me keep everything in one place. One downside is that the layout can be a bit basic, but it works for a personal project. If you’re also an anime fan, maybe check out my profile!